A valve includes a valve body, a valve seat, and a poppet assembled with the valve body. The poppet includes an axially extending poppet stem and a radially extending poppet sealing surface. The poppet is axially movable between a closed position and an open position. The poppet sealing surface is defined by a sealing member disposed on the poppet stem. The sealing member is laterally movable on the poppet stem. When the poppet is moved from the open position to the closed position, the sealing member is laterally moved to align the sealing surface with the seating surface.

A valve plate for a closure device for closing an opening in a vacuum-tight manner. A front side of the valve plate has a seal ring for sealing to the wall, and the rear side has a depression for connecting to a valve rod. In regions of two mutually opposite lateral walls of the depression, an extension adjoins in each depression. For each respective extension a threaded bore is present, which on a lateral wall thereof opens into the extension. The valve rod is connectable to the valve plate by a respective retaining bolt screwed into the respective threaded bore and via an end portion that protrudes from the threaded bore into the extension, with the end portion interacting with a groove on a connecting part connected to the valve rod end, or at the valve rod end is configured integral to the latter.

A closure device for closing an opening in a wall in a vacuum-tight manner has a valve plate, which by way of a connecting device is connected to a valve rod, for closing and exposing the opening. The connecting device has a swivel head of which at least portions of the external surface are of a spherical configuration and which is disposed in a receptacle space of a joint body. For blocking a rotation of the swivel head about the longitudinal axis of the valve rod, at least one projecting stud, that is disposed on the swivel head or joint body, protrudes into an assigned groove which is disposed in the other one of these two parts and which in a central position of the connecting device extends in a plane that lies parallel to the longitudinal axis of the valve rod.

A fluidic valve for switching between different fluid coupling states includes a stator having at least one fluidic stator interface, a rotor having at least one fluidic rotor interface, wherein the rotor is rotatable relative to the stator to thereby switch the fluidic valve between a plurality of different fluid coupling states between the at least one fluidic stator interface and the at least one fluidic rotor interface, and a force transmission mechanism configured for pressing the stator and the rotor together by a contactless force transmission to provide for a fluid tight sealing between the stator and the rotor.

A valve for a liquid chromatography system comprises a stator; a rotor that rotates about a vertical axis relative to the stator, the rotor comprising a rotor body and a rotary shaft interface, the rotary shaft interface comprising a cavity along the vertical axis and an indentation at a bottom region of the cavity along the vertical axis; a platen in communication with a bottom surface of the rotor body, the platen having a conical feature along the vertical axis; and a ball bearing having a top portion positioned in the conical feature of the platen and a bottom portion positioned in the indentation of the rotary shaft interface allowing for pivoting of the platen relative to the vertical axis and for aligning a top surface of the rotor body to be parallel with a surface of the stator.

The triple prevention gate valve according to the present invention comprises a rectangular housing (10) with a slide space (11) formed inside and a circular main passage (12) formed on both sides with an outer diameter smaller than the width of the slide space (11) towards the bottom side; a disk valve assembly (20) installed to be movable within the slide space (11) and selectively opening and closing the main passage (12); an actuator (30) for moving the disk valve assembly (20) to open and close the main passage (12); a first ring guide (40) installed on one side of the housing (10) and communicating with the main passage (12); a second ring guide (50) provided on the opposite side of the first ring guide (40) and communicating with the main passage (12); a protection ring (60) provided inside the second ring guide (50), capable of reciprocating sliding through the main passage (12), blocking the slide space (11) or opening it to allow the ingress of the disk valve assembly (20) depending on its slide state; and a heating unit (80) provided along at least one outer surface of either the first ring guide (40) or the second ring guide (50) for heating.